Flow cell holder



FIG. 1 is a top view of a flow cell holder, showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a back view thereof;

FIG. 5 is a side view thereof;

FIG. 6 is a top perspective view thereof; and,

FIG. 7 is a bottom perspective view thereof.

The broken lines shown in the drawings represent portions of the flowcell holder that form no part of the claimed design.

CLAIM The ornamental design for a flow cell holder, as shown anddescribed.